阳谷县麦田生态系统杂草群落结构初步分析

An Investigation on Weeds Community Structure of Wheat Field Ecosystem in Yanggu

2015年4月对阳谷县麦田生态系统杂草群落结构进行初步调查,发现杂草11科22属23种。结果表明,各样地种的丰富度2~11之间,平均密度12.03株·m^(-2)。杂草优势种共7个,其中阔叶杂草6种,分别为播娘蒿、荠菜、小蓟、麦瓶草、小藜和猪殃殃(IV≥50%),播娘蒿平均密度、相对多度、分布频度和重要值均最高,为第一优势种;禾本科杂草1种,为雀麦,是第二优势种。稀有种(IV≤10%)1个,为多花黑麦草。其余15种为常见种(10%<IV<50%)。

An investigation was carried out to determine the community of weeds in wheat field ecosystem of Yanggu in 2015. 23 species weeds, belonging to 22 genera , 11 families were found. Species richness in different sample plots between 2 to 11, and aver- age density were 12.03 per square. D. sophia, C. bursa-pastoris, C. setosum, S. conoidea, C. serotinum, G. aparine L. var. tenerum belonging to broadleaf weeds and B. japonicus belonging to gramineous weeds were the dominant species（IV≥ 50%）. D.sophia showed the highest average density, distribution frequency, relative abundance and importance value, being the first dominant species. B. japonicus belonging to gramineous weeds were the second dominant species. L. multifiorum were the rare species （IV ≤ 10%） and other 15 species were the common species （10%〈IV〈50%） in Yanggu wheat field ecosystem.